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Strong temporal variation of consumer delta C-13 value in an oligotrophic reservoir is related to water level fluctuation

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F23%3A43906245" target="_blank" >RIV/60076658:12520/23:43906245 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1038/s41598-023-30849-9" target="_blank" >https://doi.org/10.1038/s41598-023-30849-9</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1038/s41598-023-30849-9" target="_blank" >10.1038/s41598-023-30849-9</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Strong temporal variation of consumer delta C-13 value in an oligotrophic reservoir is related to water level fluctuation

  • Original language description

    Using stable carbon and nitrogen isotope analysis (delta C-13 and delta N-15) to assess trophic interactions in freshwater ecosystems is a well established method, providing insight into ecosystem functioning. However, the spatial and temporal variability of isotope values, driven by environmental fluctuation is poorly understood and can complicate interpretations. We investigated how the temporal variation of stable isotopes in consumers (fish, crayfish and macrozoobenthos) of a canyon-shaped oligotrophic reservoir is associated with environmental factors such as water temperature, transparency, flooded area, and water quality measures. Consumers and their putative food sources were sampled and analyzed for carbon and nitrogen stable isotopes annually, and environmental parameters were measured monthly from 2014 to 2016. Results revealed significant differences in delta C-13 and delta N-15 values in each consumer among studied years. Over the years, fish and crayfish expressed differences in delta C-13 between 3 and 5 parts per thousand, whereas in zoobenthos differences were 12 parts per thousand. Variability in delta N-15 was similar across all consumers (2-4 parts per thousand). Moreover, results suggest that the flooded area of the reservoir was a major driver of delta C-13 stable isotope values variation in consumers, while variation in delta N-15 was not linked to any of the studied environmental factors. Bayesian mixing models further showed significant changes in the origin of detritivorous zoobenthos carbon sources (reversal shift from terrestrial detritus to algae origin) between years with low water level to years with the standard water level. Other species showed only slight differences in food source utilization among years. Our study highlights the importance of environmental factors as sources of variation in consumer&apos;s stable isotope values which should be considered especially when studied ecosystem strongly fluctuate in some environmental factor.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10618 - Ecology

Result continuities

  • Project

    <a href="/en/project/LO1205" target="_blank" >LO1205: Sustainability and Excellence of the Centre of Aquaculture and Biodiversity of Hydrocenoses</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Scientific Reports

  • ISSN

    2045-2322

  • e-ISSN

  • Volume of the periodical

    13

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

  • UT code for WoS article

    000946670000021

  • EID of the result in the Scopus database

    2-s2.0-85149574152